Can you tell me what 'mm' thinkness the writing tips are?
Temps that ink reappears?
The Frixion pen tips are 0.7mm
The ink reappears at temps at 14 F.
jetpens.com carry a set of 24 for $46 and some change. Some really neat colors. I'm a junkie for pens and stuff. Love office supply stores.
Robin in Brownwood TX